Calculating-machine.



D. E. FELT.

UALGULATING MACHINE.

APPLIoATIoN FILED APB. 5. 191s..

DORE E. FELT, 0F ,CHICAGGL IILINGIS.

.cALcULA'rING-MAGHINE.

'-Speoieation of Letters Patent,

Patented Oct. 7, 1913.

`Application led April 5, $1913. Serial No. 759,192.

To all whom t may concern Be it known that I, Donn E. FELT, a citizen of the United States, residmg 111 Chicago, in the county of .Cook and State. `of Illinois, have invented a new and useful g -Machines,` of,

j ably comprises vertical side or .retaining Improvement in -Calculati which the following is -a -specliication My invention relates to multipleorder keyboard calculati machnes, including such calculating mac ines as the well lmown comptometers set forth in, among others, my prior U. S. Patents `Nos. 762,520 and 762,521 of June 2,9, 1904; No. 767,107 of.

Aug. 9, 1904:; No. 960,528 of ,June 7, 1910; No. 992,950 of` May 29, 1911; No. 996,099

of June 2o, 1911; Nos. 992,416 and 992,4,174

of Jan. 24, 1911; No. 1,003,723 of Sept. 19, 1911; and No. 1,028,344 of. June 4l,- 1912; .and to other machines with which it is adapted to be combined in ,construction and operation. Y,

v',Ihe present invention relates more particnlarly .to the cancelin .or -zeroizing mechanism, and has for its o ject to prevent any overthrow or `furthery turning .of ,tlief numeral wheels after they have'arrived .at zero, by reason of a violent operation of ,the canceling crank .or :handle and a rebound of the same at the endlof its final canceling and zeroizingstroke. And the invention-has for fur-ther objects the effectin of all other improvements in structure or ction that may .be found to obtain in the mechanism hereinafter .described -or claimed,

In order to make the invention more clearly understood there are shown -in the accompanying drawings .means for :carrying the same into practical effect, without limiting the improvements, in their ,useful applications, 4,to the .particular constructions which, for the purpose .of explanation, have been delineated.

In the said drawings-Figure :1 isV a side view, .of so much of a lcalculating machine f5 embodying the invention as is necessary sop for an understanding of the latter, the casing and ,base being removed. Fig. lashows, j

m side elevation, the rear part of the -machine omitted from Fig. 1.` Fig. 2 is ai lan view showing the lrebound-preventingl` device. Fig. 3 is a horizontal section o the same on line 3--3 .of Fig. 1.

Following is Aa .description of the particular calculating machine, including so much; ofthe ,accumulating and canceling'mec'hanism as is necessary to mention, to which the invention is in this instance applied.

Referring -to the drawings, 1 lndicates the vertical retaining plates constituting a part of the frame of the machine, and 2 the top plate thereof. The frame preferplates, such as are shown at l, and similar intermediate plates one of which is arnominational series of linger keys 5 mounted to reciprocate vertically 1n guide' apertures or bearings in the top plate 2, and the lower end of .each key stem 1s pressed upward by a lever and spring .of known form `(not shown) carried lby lower frame parts 7.

For convenience I will recapitulate certain of the parts, and their functions, known in and by the prior patents above mentioned; but it is not necessary to an .explanation `of the resent improvements to repeat all of the description and illustration of said patents. The principal parts are the following: column actuators or segment levers 8 pivotally mounted at 9 on the frame 1, and yieldingly held up by accumulator actuating springs 10; odd and .even stop levers 11, l1', 12, 12 each'of which may comprise two separate co-acting parts and' which are pivoted tothe rear and front of the frame at 13,14; stopl detents 15 carried by the :lever parts 11', 12', to engage with the coarse spaced' teeth 17 on the column actuator and arrest the downward movement of the latter; accumulator pinions 18 mounted on the cross pivot accumulator shaft. 19 and engaged .and turned by the col-umn actuator segments; accumulator rato-bets fixed to the pinions 18; lantern wheels having pawls pivoted thereon and arranged within the ratchets, .whereby the ratchets turn backward freely -but on their roo :forward movement rotate the lantern wheels by means of the said pawls; a back stop pawl,

and a locking detent, for each lantern wheel, the locking detents being spring pressedaway from Athe lantern wheels and being pushed into engagement by roller studs 18 on the colum actuator; intermediate gears on the intermediate pick up shaft 25, which are engaged and driven by accumulator gears attached to the lantern wheels and which engage and drive thenumeral wheel gears; carrying pinions attached to .the accumulator gea-rs and meshing with and driving carrying gears on the cross pivot carrying shaft 29; carrying motor springs encircling the shaft 29 and connecting tlie carrying gears yieldably with rotary escapements on the shaft 29; two armed carrying cams Xed on the said escapements and given, by means of the said carrying motor springs and escapements, a half revolution at each half revolution of the carrying gears or whole revolution of the carrying pinions; carrying levers each of which is pivoted on the cross pivot shaft or rod 33 and is arranged in line with the lantern wheel in the neXt higher order of accumulator mechanism, said carrying levers being raised by the carrying cams at each half revolution of the latter; carrying pawls pivotedJ as are the locking detents, on the carrying levers and operating on the pins of the said next higher lantern Wheel -to move the latter and its accumulator mechamsm one step at each carry; carry-detaining latches to enable two keys in contiguous orders to be simultaneously depressed without losing a carry; cam-actuated three armed detents 36 for locking the carrying levers; and canceling stops for positioning the accumulator mechanisms and numeral wheels in canceling, mounted on a rock bar 38.

The machine is of the .duplex type; that is to say, two keys side by side, in different orders, may be simultaneously depressed and each will have its proper and full effect in the accumulation. To this end the carrying mechanism is adaptedto permit prime actuations of the accumulator mechanism in a plurality of orders simultaneously. That such full effect of the depression of the key of lower order be attained it is necessary that any carrying, which may be due to take place from the lower numeral Wheel`to the higher numeral wheel, shall not be lost by 'reason of the higher numeral wheel having such forward motion that the carrying mechanismv may not affect it. The latch is plvotally mounted on the cross rod 39 of the frame and extends over the carrying mechanism, resting at its inner or rear end on the stud pin 40 of the column actuator 8. rlhe latch has a tooth which is adapted to engage either (whichever may rst encounter it) of the two projections on the rotary hub or sleeve of the carrying mechanism. When any key of the order to which a carry 1s to be made is struck the actuator 8 of that column and its pin 40 move do-wn, allowing the latch to drop Where its tooth may engage a projection and arrest any rotation of the carrying devices which might at that time be ineffective. The carrying devices continue to be so held until the column actuator 8 rises, and the key and numeral Wheel ofthe higher order have completed or substantially completed their operation, whereupon the pin lifts the latch, and releases the carrying mechanism, and allows the latter to be actuated by its carrying spring to effect the proper carry which may be vdue to occur. The carrying mechanism of each column or order is provided with a set of the described parts.

43 is the latch releasing' device, preferably a swinging release bar which releases the latches and connected carrying mechanisms and wound up carrying motor springs. It is formed with arms 44 pivoted to the frame on the cross rod 39 and is arranged to engage the tail piecesyof the latches at a point below the pivot cross rod 39 of the latches and force thembackward to liftl the latch teeth.

46 indicates links which pivotally connect with the arms 44 of the release bar at 47 l above the pivot rod 39 and connect with the forward endls of release levers 49 at 50. These release levers, one at each side of the machine, are pivo-ted to the frame at 51.

The canceling means, whereby the numeral wheels are reset at zero, comprises a canceling actuator, or cancellation controlling means, consisting in this inst-ance of a cross rock shaft 52, crank handle 53 and slotted cam 54. These parts loperate on a canceling device comprising a segment lever 55 actuated by the slotted cam; a canceling pinion 56 on the canceling 'or intermediate shaft 25; and means by which said shaft may rotate the intermediate gears when the shaft is in a certain position relative to the gears. The canceling means also comprises devices el'ecting a one-space adding movement of the column actuators, consisting of a transverse bar 57 adapted to depress the column actuators one space and give a one-space adding movement to the accumulator mechanism, which bar is reciprocated vertically by the slotted cam through the medium of arms 58, which carry the bar at their ends andV are pivoted at 51 to the frame 1. All of these parts are or may be similarto those set forth in my said patents, and a showing of most of them is unnecessary to an understanding of the invention herein claimed.

The canceling operation: For accuracy in bringing the numeral wheels from their various positions all to the 0 position, those of the second and higher orders are first brought to the .8 position, and the units wheel is brought to the 9 position; then the cross bar 57 and the column act-uators having been depressed one step, rise and Immos move -all of the wheels one step, the -vvheels' carrying pinions, which may engage the under side of the stops on the canceling stop levers or arms. The latter are affixed to the said transverse canceling stop rock bar 38 mounted to oscillate in the lower part of the frame. When the stops are rocked forward into the paths of the stop studs they are adapted to arrest the carrying pinions 1in such position that leach numeral wheel of higher order than units is held n ositively in the 8 position, the units whee stopping at the 9 position by reason of a little later (36 degrees) positioning of its stud on its pinions.` The rock bar 38 is Vactuated by a cam and lever and toggle mechanism on the left side of the machine (not shown), which is set forth in .the joint application of D. E. Felt and J. A. V. Turck filed Apl. -5 1913, Serial No. 759,193.

The means for preventing any possible rebound of t-he canceling actuator after it reaches theend of its lfinal throw and has zeroized the machine, and any consequent forward turning of one or more of the numeral wheels, comprises a positive stop for said actuator. In the construction lllustrated it is shown as consisting of a stop, tooth or hook 83 adapted to be moved momentarily into the path of a corresponding stop 84 'on some part which is aflixed to or connected with some part which is turned, reciprocated or moved by the canceling actuator. In this instance the stop 84 is formed with the slotted cam 54, and is arranged to be a little higher that the stop 83 at the instant when the canceling actuator is arrested at the end of its forward movement. vThe stop 83 is carried by an arm 85 pivoted at 86 to the frame of the machine, and is normally and when it is out of operation drawn back by a spring-87 against a fixed stop 88. Connected with the arm is an arm 89 which extends across the upper part of the path of a pin 90 fixed on some part which tu'rns with the canceling actuator, in thisinstance on the said slotted cam 54.

The rearward rock of the canceling actuator said stop '93. r{Ilhe pin '99 `is so positioned that '-it will, just 'before the end of the for-4 ward movement of the canceling actuator and slotted cam', engage the arm 89 and raise it slightly. If *the forward movement of the canceling vactuator is normal and usual, and without especial violence, there is no necessity for the action of the rebound stop, and the said engagement does not throw 4the stop 83 forward far enough to car-ry it into the path of the stop 84, the arm -85 being held back by the spring 87, as, seen in F ig. 1. But lif fthe pin '90 strikes the arm 89 with some violence the stop 83 is thrown forward under the stop 84, and on any attempted rebound of the canceling actuator the stop 83 engages and positively arrests the stop 84 and the canceling actuator. The stop 83 remains inactive during the first rearward movement of the canceling actuator and downward movement of the stop 84, and also during the reverse and final movement of said parts, except under the conditions and as above explained. lTo Vso proportion the parts that 'the stop 83 would be normally in the path of the stopr 84 and would be withdrawn to inactive position as the stop 84 passes it at normal speed would be ya variation of the construction illustrated and within the invention claimed. The main purpose of the rebound stop is to permit, as distinguished from deterring, interrupting or retarding, the most rapid operation and movement of the canceling handle, and to accelerate the machine in use, without allowing any possibility of misplacing the numeral wheels after they have been zeroized.

What I claim isl 1. In a calculating machine having multiple-order accumulator mechanism, including numeral wheels and carrying mechanisms, in combination a canceling device for restoring the accumulatory mechanism to normal position or zero; and a positive stop acting when the canceling device has' reached the end of 110 its final throw to prevent the rebound of the canceling device and an improper positioning of the accumulator mechanism; substantially as specified.

2. In a calculating machine having multi- 115 ple-order accumulator mechanism, including numeral wheels and carrying mechanisms,` in combination a canceling device for restoring the accumulator mechanism to normal position or zero; and' a positive stop 120 movable into the path of a part of the canceling device at the end of its final movement and acting to prevent the rebound of thi;i canceling device; substantially as specifie 3. In a calculating machine having multiple-order accumulator mechanism, in cludmg numeral wheels and carrying mechanlsms2 1n combination a canceling device for restorlngv the accumulator mechanism to normal position or zero; and a stop movable into the path of a part of the canceling device at the end of its final movement and acting to pre vent the rebound of the canceling device, the

canceling device having means to so move the stop; substantially as specified.

et. In a calculating machine having multiple-order accumulator mechanism, including numeral Wheels and carrying mechanisms, in combination a canceling device for restoring the accumulator mechanism to normal position or Zero; a stop moved with the canceling device; a stop actuating part moved 'with the canceling device; and a swinging stop movable to engage the stop Which1` moves With the canceling device and having apart which may be engaged by the stop actuating part at the end of the inal movement of the canceling device, to operatively posit-ion the swinging stop and prevent rebound; substantially as speciiied.

5. lin a calculating machine-having multipleorder accumulator mechanism and a series of column-actuators, in combination a canceling device adapted to advance a plurality of the orders from diverse positions to a predetermined limit; cancellation controlling means to operate said canceling device Levage@ and eqect a succeeding adding movement of the series of column actuators; and a stopping device or engaging the cancellation controlling means, after it has completed the cancellation, and preventing a rebound of the same; substantially as speciiied.

6. ln a calculating machine having multiple order accumulator mechanism and a series of column actuators, in combination a cancelin device adapted to advance a plurality o the orders from diverse positions to a predetermined limit; cancellation controlling means'to operate said canceling device, comprising a cam, a stop connected with the said cam and turning therewith, a stop on the frame of the machine, and means for moving the second stop into the path of the stop on the cam when the zeroizing operation is completed to hold the cancellation controlling means from rebound; substantially as speciiied.

Signed by me on the 27 day of March, 1913, in the presence of two subscribing Witnesses.

DORR E. FELT.

Witnesses:

H. N. Low, PHILIP E. KUN'rz. 

